Door-lock.



L. 1v1. PETERSON.

DOOR LOOK.

APPLIOATION FILED' OOT.14, 1912. v 1,071,460. Patented Aug. 26, 1913.

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UNITED STATES PATENT OFFIC.

DOOR-LOCK.

Specification of Letters Patent.

Patented Aug. 26,1913.

Application led October 14, 1912. Serial No. 725,751.

To all 'whom t may concern:

Be it known that I, LARs M. PETERSON, a citizen of the United States, residing at Bingham Canyon, in the county of Salt Lake and State of Utah, have invented certain new and useful Improvements in Door- Locks; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to improvements in door locks.

One object of the invention is to provide a door lock having a plurality of locking bolts and means whereby they may be operated to lock and unlock a door in the ordinary manner and which is also provided with means to prevent the retraction of all the bolts at the same time thereby preventing the unlocking of the door.

Another object is to provide a lock of this character which will be simple, strong and durable in construction, efficient and reliable in operation and which is provided with a spring projected knob operating latch.

IVith these and other objects in view, the invention consists of certain novel features of construction, and the combination and arrangement of parts as will be more fully described and claimed.

In the accompanying drawings: Figure 1 is a side view of my improved lock with the outer plate of the casing removed and showing the locking bolts in a retracted or unlocked position; Fig. 2 is a similar view showing how the parts are operated for locking the door in the ordinary manner or whereby the same may be unlocked by a reverse movement of the key and which also illustrates the iirst movement and position of the parts when operated to prevent the unlocking of the door; Fig. 3 is a similar view showing the second movement and position of the parts when operated to prevent the unlocking of the door; Fig. 4 is a similar view showing the neXt movement and position of the parts when operated'to prevent unlocking; Fig. 5 1s a similar view showing the next and last movement and position ofy the parts in the positive locking operation; Fig. 6 is an outer side view of one side of the lock; Fig. 7 is an end view of the same;v

Fig. 8 is a horizontal sectional view taken on the line 8-8 of Fig. 5; Fig. 9 is a detail perspective view of the upper bolt of the lock; Fig. 10 is a similar view of the bolt operating key; Fig. 11 is a similar view of the detent operating key; Fig. 12 is a View fied construction of the lock; Fig. 13 is an outer side view of the same; Fig. 14 is a detail perspective view of the detent operat-ing device for the modiiied form of the lock.

which is here shown and is preferably of flat rectangular form and has slidably mounted therein an upper locking bolt 2 and a lower locking bolt 3. The bolts 2 and 3 held in position in the lcasing 1 by centrally disposed guide blocks 4. The blocks 4 are separated at a suit-able point to form a space in which is arranged a key actuated lock bolt space between the outer block 4 and the end of the lock and between the bolts 2 and 3 is slidably mounted a latch bolt 7 having a beveled outer end which is yieldingly held the keeper of the lock by a coiled spring 8 arranged between the outer guide block 4 and the inner end of the latch 7, said spring having its end engaged with studs 9 in the yend of the latch and block 4 as shown.

In the latch bolt 7 is an elongated slot 10 and in one side of the latch bolt Yis a semielliptical recess 11 which forms at its inner ends shoulders 12 adapted to be engaged by the door knob'whereby when the latter is Aturned in either direction the ward 13 will be brought into engagement with said shoulders 12 thereby retracting the latch bolt 7 latter again projects the latch and yieldingly vholdsfthe same in projected position as soon as the knobs are released. The outer portion of the latch bolt 7 is reduced and slidranged in the casing of the lock as shown. The blocks 15 also serve to support and guide the outer ends of the locking bolts 2 and 3, said outer portion of the bolts being for the casing screws at this endv of the lock casing and to permit the bolts to be projected past said screws.

The upper bolt 2 has formed thereinV near which are engaged two guide pins 17 secured at one end to one side of the lock similar to Fig. 1 showing a slightly modi- 60 My improved lock comprises a casing 1 65 are spaced apart and slidably supported or spindle 6 herein after described. Iii the 75 in a projected position for engagement with 30 the ward 13 on the barrel or spindle 14 of 90 against the pressure of the spring 8 which 95 -ably mounted between guide blocks 15 ar- 100 recessed on their outer edges to provide space its upper edge a longitudinal slot 16 with 110 casing. In the inner edge of the upper bolt 2 are formed recesses 18 in which are pivotally secured 20 arranged in the recesses 18 above 'the pawls as shown. The free ends of the pawls 19 are provided with notches 21 land' wit-h stop lingers 22 said iingers engaging stop lugs 28 on the adjacent end walls 'ot the recesses 18 whereby the pawls 19 are held in operative position as shown. The notches 21 in the ends of 'the .pawls 19 form one part of recesses 24 the other parts of which are formed by similar notches 25 in the adjacent walls of the recesses 18. In the lower edge of the locking bolt 2 midway between the recesses 241is also formed a recess 26. The recesses 24 and 26 when thus arranged form a series of rack Ateeth 27 the purpose of which will be hereinafter described. In the outer edge of the 'bolt 2 are formed a series lof stop notches 28 with which is adapted to be engaged a stop spring 29 having its outer end bentto form a curved tooth 30which engages .the notches 28 and yieldingly holds the upper locking bolt 2 in its adjusted posi-tions. y The lower locking bolt 3 has in its upper edge a series of recesses 81 which form a plurality of rack teeth 32 the purpose of which will be hereinafter described. In the outer edge of the bolt 8 are formed a series of spaced notches 33 with which is engaged lthe rounded tooth 84 of a stop spring 35 secured lto the adjacent edge ot' the lock casing, said spring thereby yieldingly holding vthe lower locking bolt 3 in its adjusted positions.

rlhe bolt operating spindle 6 which is revolubly mounted in the center of the space 5 between the guide 4blocks 4 comprises Aa circular -disk or plate having on its outer edge at diametrically opposite points laterally projecting rack engaging lugs 36 which are adapted to be engaged with the recesses and teeth on the inner edges of the rlocking bolts whereby when said spindle is turned in one direction or the other the locking bolts will be projected and retracted. In the center of the spindle 6 is a circular keyhole 37 which registers with keyholes 38 in the side plat-es of the lock casing, and-on the opposite sides of the spindle 6 aroundy the key hole vtherein Vare formed annular; flanges 39 which engage annular recessesy in the innerwalls of the side plates of thel casing around the keyholes therein whereby thespindle is vrevolubly held in position vinE the casing. In one side of the keyhole 87; in the spindle. is formed a radially disposedl notch 40 which is adapted to receive the ward 41 of the key 42 when inserted .in thev lock whereby the spindle 6 may be turned in the proper direction for operating the locking bolts.

The key 42 comprises a shank having on pawls 19 which are yieldingly held in their normal positions by lat springs one end a suitable head or handle 48 and having in one side of its opposite end a lon- -gitudinal groove 44 in which is arranged .the ward 41, said ward being in the form of a narrow spring secured at its inner end in the inner end of the groove 44 and having its 4outer portion bent outwardly to form Va curved projection which when the key is -inserted through the keyhole 88 in the lock casing is sprung back into the groove of the key to permit the end ofthe key to enter the Aloclrand which after the key is inserted in the llock and in the aperture 37 of the spindle will spring out into :engagement with the radial notch 40 thereby permitting the spindle yto be turned by the key. When the key is retracted the spring ward 41 is again depressed into the groove 44 to a suiL i ticient extent to permit the key to be drawn out of the keyhole 38 in the lock casing.

The outer end of the inner :guide vblock 4 is cut away on one side as at 45 and in said cut away end of the block .is formed a recess v46 .and a vertical passage 47 which communicates with the recess 46 and opens `at its ends 'through the upper and lower sides A of ithe Iblock as shown. rIfhe side vedges 'of 1 the cutaway-end 45 are under cut or beveled i as at 48 to receive a sliding plate 50 the .edges of which are beveled to ilit the under cutledges of the ycut away end whereby the plate -50 'is held in position over the recess 46 and passage 47. ISlidably mounted inthe 'passage 47 isa detent 51 having on one'edge `a series of rack teeth 52and having therein a Alongitudinal slot `T8 which receives va stop rpin -54 secured in the recess of the vblock whereby the movement ofthe detent Ais limited. Itevolubly mounted in Vthe recess 46 lfis a segmental detent operating .gear o5 the teeth of which are adapted to engage the lteeth'of the-detent whereby when said gear is turned in vone direction or the other the 'detent will be .projected or 4retracted to goperative Iand inoperative positions. When 'the detent is in a projected position the lower end `of -the same will form a stop which Yis engaged by the inner lend of the llower locking bolt 2 'and which limits the inward -movement of said bolt and thereby prevents the operation of the bolts and unlockingof the-door by thekey 42. The gear 55-1na-ybe provided witha centrally disposed lkeyhole 56 fto receive ythe inner end of a suitable key 57 which is inserted ythrough ikeyholes 58 `in the sides of the `lock casing fasclearlyindicated in Fig. 8 of the drawings 'or .if desired the gear 55 maybe operated by-the shank 59 of a stationaryknob or handle 60 which remains inthe lock as will be ireadily understood. It desired the sides of 'the lock andthe knob plate on the door ad acent to the knobs or handles 60 may'have thereon a series of numerals 61 arranged in a circle similar to the scale of numeralson a combination lock, said numerals 61 being provided simply to mislead or confuse any unauthorized person or any one unfamiliar with the operation of the lock, in attemptin to unlock the door.

In Figs. 12 and 13 of the drawings is shown a slightly modified form of the lock. In this instance the construction and arrangement of the parts is substantially the same as that shown and described in the other figures of the drawing, the only difference being in the slight variation of the locking bolts 2a and 3a which in the modified form of the lock are somewhat simplified. In the modification the upper locking bolt 2a has a less number of recesses 21b with which the lugs on the bolt operating spindle are engaged only two of said recesses being provided in said bolt 2aas shown. Vith this exception the bolt 2a is constructed the same as the bolt- 2 in the first form of the lock. In the modification the lower bolt 3a is provided with a longitudinal guide slot 3b which corresponds with the guide slot 1G in the upper bolt of the first form of the invention and has engaged therewith a singlrl guide pin 3a which is secured to one side of the lock casing. Because of the similarity of the construction of the other parts of the modified form of the lock to the same parts of the first form of the lock a further description of these parts is not thought to be In the operation of the lock to fasten a door in the usual manner wherein the same may be unlocked at any time by the use of a proper key it is simply necessary to insert the key into the lock and into engagement with the bolt operating spindle in the manner described and to revolve the spindle in the proper direction for projecting the upper locking bolt 2 and retracting the lower locking bolt 3 to the positions indicated in Fig. 2 of the drawings. When the bolts are in this position it is simply necessary in order to unlock the door to turn the spindle in a reverse direction until the upper bolt has been again retracted into the casing and the lower bolt projected to its normal position as shown in Fig. 1. Vhen it is desired to lock the door so that the same cannot be unlocked by the key .alone the parts are operated as follows. In this operation the upper bolt 2 is projected and the lower bolt retracted in the same manner as when ordinarily operating the lock and as indicated in Fig. 2 of the drawing. After the upper and lower bolts have been thus operated the spindle is reversed or turned in the opposite direction to retract the upper bolt and to project the lower bolt beyond the casing and to the position shown in Fig. 3 of the drawings, wherein it will be seen that the upper bolt 2 has been retracted to its greatest extent while the lower bolt 1s still in position to be projected another notch by a further revolution of the spindle. As all of the notches and teeth of the upper bolt have been used it is necessary to provide space in the upper bolt to permit another revolution of the spindle in order to further project the lower bolt 3. This *additional space in the upper lock of the bolt is provided for by the pivoted pawl 19 which when the detent is turned to a suficient extent to bring the uppermost lug thereon into engagement with the under side of the pawl as shown in dotted lines in Fig. 3 o-f the drawings the latter will be raised thus permitting the complete revolution of the spindle and the further projection of the lower bolt 3 to the position indicated in Fig. 4 of the drawings. After the detent has been turned to bring the uppermost lug thereof past the pawl 19 the latter will again spring down to a normal position as is also shown in Fig. l of the drawings. Then the parts have been brought to this position the segmental gear 55 of the detent 51 is operated by its key or handle to project or lower the detent 51 so that the projecting end thereof will be in the path of the retracting movement of the lower bolt as clearly shown in Fig. 5 of the drawings. After the detent 51 has thus been projected to an operative position the spindle 6 is again turned in a forward direction thereby projecting the upper bolt 2 to an operative position and retracting the lower bolt 3 until the inner end thereof engages the detent 51 as shown in Fig. 5 in which position a furtwher retraction of the lower bolt or operation of the spring in a forward direction is prevented. This completes the locking operation and it will be readily seen that should the spindle be reversed to retract the upper bolt that the lower bolt will be projected or in other words, when the parts are in the position shown in full lines in Fig. 5 it will be impossible to retract both of the bolts as when the spindle is turned to retract one bolt the other will be simultaneously projected so that the door is securely fastened by one or the other of the bolts as long as the detent 51 remains in an operative position and prelifepts the complete retraction of the lower In order to unlock the door when the parts are in the position just described it is first necessary to retract the detent after which the spindle may be brought around to the position shown in dotted lines in Fig. 5 of the drawings wherein the lowermost lug will engage the last recess 31 in the lower bolt while the uppermost lug of the spindle wil-l engage and lift the inner pawl 19 of the upper bolt which will permit the movement of the spindle thereby retracting the lower bolt to its greatest extent and wherein the position of the parts will be the same as illustrated in Fig. 2 et the drawings or the position assumed in the ordinary operation of the lock. Vhen the part-s have been brought to this position it will be simply necessary to turn the spindle in a reverse o-r backward direction `which will retract the upper bolt and project the lower bolt until the outer ends of both of said bolts are flush with the outerA end of the lock casing or in the position shown in Fig. l of the drawings. j

From the foregoing description taken in connection with the accompanying" drawings, the construction and operation oi the 'invention will be readily understoodwithcasing, al pair of bolts slidably mount-'ed therein, a guide block between them, a

springprojected latch slidably mounted in said casing forward of said block, means to retract said latch, a key-actuated spindle "having an operative engagement with said bolts whereby the latter are projected and retracted to operative and inoperative positions oppositely and simultaneously, a detent in said casing' at the rear end of said block, and means to move said detent vertically whereby the retraction of both of said locking bolts at the same time is prevented.

2. In a lock of theeharacter described, a casing, an upper locking bolt and a lower locking bolt slidably mounted therein, said upper locking bolt having in one edge a series ot recesses which form a plurality of rack teeth, spring projected pawls pivoted in the lower edge of said upper bolt and adapted to be retracted therein, said lower locking bolt having' in one edge a series ot recesses to form a plurality of teeth, a key actuated spindle revolubly mounted in said casing and having thereon oppositely projecting lugs adapted. to be brought into engagement with the recesses and teeth on the edges of said locking bolts whereby the latter are projected and retracted and a manually operated detent adapted to be projected to an operative position to prevent the retraction of both of said locking bolts.

3. In a lock of the character described, a casing, upper' and lower locking bolts slidably mounted therein, said upper bolt having recesses and a longitudinal guide slot, spring projected pawls adapted to form a yielding closure for the recesses in said bolt, series ot rack teeth formed on the adjacent edges of said bolts, a key actuated bolt operating' spindle revolubly mounted in said casing, lugs formed on said spindles and adapted to be brought into engagement with saidy rack teeth whereby the locking bolts are projected and retracted, a detent slidably mounted in said casing and having' on one edge a series of rack teeth, a segmental gear mounted in said casing in position to engage the teeth of said detent whereby when said gear is turned the detent may be projected and retracted, and a key to operate said detent.

4. In a lock of the character described, al

casing, upper and lower locking bolts slidably mounted in said casing, said bolts having therein guide slots and having in their outer edges series of stop notches, series of rack teeth formed on the inner edges of said bolts, guide pins engaged with said slots, stop springs yieldingly engaged with said stop notches, a key actuated spindle revolubly mounted in said casing and having an operative engagement with said locking bolts whereby the latter are projected and retracted to operative and inoperative position, means to prevent the retraction of both of said bolts by said spindle and a spring projected knob retracted latch bolt arranged in said casing.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

LAHS M. PETERSON. IVitnesses J, A'. RADLE, F. E. MoCAR'rY.

Copies of this patent may be obtained for've cents each, by addressing the Commissioner of Patents, Washington, D. C. 

